7 April 2017
Analog Devices expands GaN power amplifier portfolio with two broadband 6GHz modules
Analog Devices Inc (ADI) of Norwood, MA, USA has launched a pair of gallium nitride (GaN) power amplifier (PA) modules that are said to offer one of the highest power density levels in their class, minimizing size and weight of the subsystem.
The HMC7885 and HMC7748 broadband modules target applications operating at 2-6GHz, including test & measurement, communications, traveling-wave tube (TWT) replacement, military/aerospace surveillance and counter-measures, and radar. The fully integrated, all-solid-state devices expand ADI’s existing line of GaN-based PAs, and feature ease of use to accelerate prototyping and system design.
The HMC7885 is a 32W, hermetically sealed, hybrid amplifier housed in an 18-lead hermetic ceramic/metal multi-chip module flange-mount package (measuring 1” × 1.4” × 0.15”) for high-reliability applications. The hybrid amplifier typically provides 21dB of small-signal gain and 45dBm of saturated RF output power. The device draws 2.2A of quiescent current from a 28V dc supply. Both RF input and output are DC blocked and matched to 50 ohms for ease of use. An evaluation board is available with layout and bill of materials to facilitate design-in and user application.
The HMC7748 is a 6-lead fully integrated multi-stage power amplifier module with connector interface (measuring 3.75” × 3” × 0.6”) that delivers 25W of saturated output power, accepts inputs up to −8dBm maximum, and provides small-signal gain of 60dB. It includes bias sequencing and regulation, and is also internally matched to 50 ohms. The PA draws 0.7A from a 12V supply and up to 4A from a 28V supply. It includes an enable pin to provide shutdown capability so the amplifier can be turned on and off without cycling the power supplies.
These GaN power amplifiers provide significant advances in performance and packaging, for broadband, medium-power applications up to 6GHz – all of which make for a critical combination with today's size, weight, and power (SWaP).